Nutrient_Cycles___thinkquest

Nutrient_Cycles___thinkquest - Water Cycle Earth has a...

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Water Cycle Earth has a stable water supply which 98 percent of the earths water is contained in, oceans, lakes, rivers and streams with the remaining found in, the form of ice, water vapor, and in the bodies of living organisms. The constant movement of water, from earth to the atmosphere is called the water cycle. This cycle is driven by solar energy, and causes Earth's water supply is used over and over again. The sun evaporates water off of water bodies such as rivers and lakes, as well as form moist surfaces and bodies of living organisms. This water is drawn back up into the atmosphere, and falls back to earth in the form of rain. There is a greater amount of evaporation, from the ocean than the amount of precipitation (rainfall) this results in a movement of water vapor by the wind to inland areas, areas closer the ocean receive more precipitation (rainfall) than those which are further from the ocean or are protected by a mountain range. Water is also absorbed from the bodies of terrestrial plants and animals as well as the soil, the collective process of evaporation from the soil and plants is called evapotransporation. This constant movement of water through evaporation by the sun. Water which is not evaporated by the sun may reenter the water cycle by seeping down through the soil, until it reaches the, a zone of saturation, here all of the holes and cracks of the soil are filled with water below which there is a bed of solid rock which the water cannot penetrate.
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Carbon Cycle During photosynthesis organisms convert carbon dioxide in the atmosphere into carbon containing compounds such as sugars and cellulose. These compounds are then utilized by primary consumers such as cattle or elk, which, by the process of respiration, convert the carbon containing compounds into carbon dioxide and water. These processes viewed on a global scale, is called the Carbon Cycle. In the carbon cycle the primary photoynthesizers are the plants, phytoplankton, marine algae, and cyanobacteria. These organisms utilize carbon dioxide and water to produce carbohydrates and oxygen which the photosynthesizes use themselves. Plants do release carbon dioxide from their leaves and roots, and phytoplankton and marine algae and cyanobacteria, release carbon dioxide into the water where it maintains in equilibrium with the carbon dioxide of the air. Not only is carbon dioxide released by plants, it is also released by animals which eat the
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This note was uploaded on 09/08/2010 for the course NUFS 139 at San Jose State University .

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Nutrient_Cycles___thinkquest - Water Cycle Earth has a...

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